Protection: 100 Percent waterproof design achieved through high-strength, tight, seal material on the bag, pockets compartments. The top-roll buckle and fix lock bag mechanism provide safety & protection for any equipment. 2 straps, easy to carry during backpacking. Hydrolock, zippered tactical pockets for organization and protection against scratching & compression. Compartments include: - side bottle foldable pocket with zipper for water or some other stuff. For 20L bags only! - inside compartments include the pocket for double protection your mobile inner/outer d-rings (warning-Extra D-ring is not for the main straps!) - front pocket with zipper and velcro, an inner all size screen touch reflective cell phone pouch bag - light reflective stripes on black and pocket cover for yellow bags